Managed to copy by doing fewer directories at a time. Then had same problem with the other HDD. The HDDs are 10 years old. Time to junk them.
> hard to check 12 hours later. :-)
>
> copied 188 gig of 278 gig. Drive is a Samsung V-NAND 860 EVO. It is in
> an open e-SATA enclosure. Eventlog showed hundreds of these:
> An error was detected on
> device \Device\Harddisk1\DR1 during a paging operation.
>
> According to system properties paging is not set for the HDD or SDD
> drives. Also got 2 of these errors which are tied to the 433 errors. It
> refers to the HDD source drive which is 1/3 full.
>
> The system failed to flush
> data to the transaction log. Corruption may occur in VolumeId: Y:,
> DeviceName: \Device\HarddiskVolume4.
>
> Failure status: A device which does not exist was specified.
>
> Device GUID: {bb5ade65-ae68-2866-1f00-59f40ad94591}
> Device manufacturer:
> Device model: Hitachi HDS723030ALA640
> Device revision: MKAOA580
> Device serial number: MK0311YHG6XH8A
> Bus type: SATA
>
> Adapter serial number:
>